/Engine/Plugins/Experimental/Mutable/Source/MutableRuntime/Public/MuR/System.h
Only valid between BeginUpdate and EndUpdate.
[Ptr](API\Plugins\CustomizableObject\MuCO\Ptr)< const [Mesh](API\Plugins\MutableRuntime\MuR\Mesh) > GetMesh ( [Instance::ID](API\Plugins\MutableRuntime\MuR\Instance\ID) InstanceID, FResourceID MeshId )